2 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Diagnosis: Precervical portion of carapace as broad as long, trans- 

 versely convex, naked, polished, projections subequal. Inner margin of 

 major hand w^ith low, blunt teeth, outer margin a granular ridge; 

 minor hand unarmed. Inner carpal margin of major cheliped armed 

 with two median spines and one distal spine, a concavity between the 

 median and distal spines. Eyes as long as width of carapace, constricted 

 in middle, cornea dilated. 



Description: Anterior portion of carapace as long as wide, trans- 

 versely convex, naked, polished; median projection obtuse, slightly de- 

 pressed, extending to base of eye-scales; lateral projections armed with 

 a minute spinule. 



Eye-stalks cylindrical, depressed on upper surface, constricted in 

 middle, cornea dilated, subequal in length to width of carapace. The 

 ophthalmic scales are bluntly triangular and armed with a sharp sub- 

 apical spine, margins entire. The third antennular peduncle extends 

 four fifths its length past the cornea. 



The antennal acicle is slight, sharp-pointed, unarmed, lightly setose, 

 and extends to the middle of the cornea. The third antennal peduncle 

 extends more than half its length past the cornea; the flagellum is 

 lightly ciliated. 



The major cheliped is three fourths the length of the entire body; 

 merus trigonal, with upper, distal portion rounded and lightly setose, 

 inner and outer lower margins entire; carpus increasing in width dis- 

 tally, inner margin armed with three teeth, two median and one distal, 

 between these groups a wide sinus; the outer margin is nearly obsolete, 

 consisting of a slight ridge joining the outer hinge of the manus, the inner 

 proximal surface is contorted, with a deep, oblique sinus; the hand is 

 three fifths as wide as long, smooth and slightly concave on its operculi- 

 form surface and lacks a proximal transverse ridge. The inner margin 

 of the palm is an upturned low-toothed ridge, the outer margin of the 

 hand is unarmed, a simple granulate low crest. The pollex is armed on 

 its cutting edge with a sharp median lobe. The dactyl is crested with 

 a row of low teeth, the largest is proximal. The minor hand extends 

 past the carpus of the major and is one third the width of the latter; 

 merus compressed; carpus with two I'ows of spines, one on the crest, 

 the other below on the inner side. 



The ambulatory legs are unarmed on their upper crests, lightly 

 setose, surface polished, shorter than major chela. The terminal seg- 

 ment of the telson is semioval, entire. 



